Ventilator



`Mmch 25 1924.

G. H. MILLER VENTILATOR Filed NOV. 26 1921 2 Sheets-Sheet 2 Mil zal

Patented Mar. 25, 1924.

y tisana GEORGE HENRY MILLER, E LOWELL, MassAcHUsET'rs.

vEn'rILAToR.

Application ined November 26, 192i. serial No. sir/,$49.

To all whom t may concern:

Be it known that I, GEoneE H. MILLER, a citizen of the United States,residing at Lowell, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inVentilators, of which the following is a specification. Y

My invention relatesl to ventilators in general and more particularly toventilatorsfor stores or buildings with large windows that cannot bereadily opened. The invention may, however, be equally well applied todoors and windows in offices, as well as factories and dwelling houses.

It is a well knownl fact that' inrill ventilated rooms, moisturecollects and condenses on window panes, ceilings and walls when thetemperature is different on the inside and outsidethereof, and there isno escape for the moisture in the room. The condensed water willgradually lform large drops, which fall down upon the wares in the storeand `may in this manner cause great damage to fabrics and food stuffs,etc.

The object is now to provide a ventilator, which, aside from keeping theair in a sanitary condition and lit` for respiration, will permitmoisture or steam to escape before condensing and at thev same time willrevent snow or rain from entering the bullding, even while theventilator is open, and also keep out flies and other annoying insects.

In the accompanying drawings one embodiment of the invention isillustrated:

Figure 1 shows a4 perspective view of a large plate glass window withthe ventilator attached;

Figure 2 is a vertical section of the window with the ventilatorsclosed;

Figure 3 is a fragmentary vertical section showing the ventilator open;

Figure 4 1s a perspective view of some of thel details; and

Figure 5 is a perspective view of a detail.

The sash of the window, represented by the numeral 10, carries a plateglass 11 and is supposed to extend to near the ceiling of the room.Between the top of the sash and the ceiling and as close to the latteras possible, a box-like structure 12 extending across the greater widthof the sash is furnished. This box-like structure may be constructed asa separate unitor form a continuation of the sash itself. The mainthing, however, is that it is enclosed on all sides and is provided withlongitudinal openings 13 andv 14 in the outer and inner walls 15 and 16respectively of the structure.

@n the outer side wall 15 is provided a shutter 17 which is hinged as at18 at the upper edge thereof and is intended to entirely close theopening 13 in this wall.

A similar shutter 19 is provided for the opening 14 in the inner wall 16but this shutter is hinged at its lower edge as at 20, so yas to opendownwardly, instead of upwardly asis the case of the outer shutter 17. i

On the upright post 21 of the sash 1() a bell crank 22 is journaled at23 and one of its arms 24 fhas hingedconnection with a transverse arm 25on the inner shutter 19. The other arm 26 of the bell crank is journaledto the` eXtreme end of a link 27, the opposite end of said linkbeinghinged at 28 to a guide rod 29 running in bearings 30 attached tothe post 21 and parallel with the side thereof. Below the lower bearing30 a short link 31 is hinged to the lower end of the guide rod 29, whichlink is provided with a handle 32 having two or more notches 33 forengaging in the bifurcated bracket 34. lt will now be seen that with theshutter 19 in closed position as illustrated in Figure 1, the lower-mostnotch in the handle 32 will engage in the bracket 34 and thus keep theshutter 19 closed. The uppermost notch 33 in the handle corresponds tothe fullyTV open position of the shutter 19 and one or more intermediatenotches correspond to the intermediate positions of the shutter.

Within the chamber 35 formed in the boX- shaped structure 12 is provideda horizon tally swinging arm 36 fulcrumed at 37 on a bearing piece 38secured on the bottom of the chamber 35. This bearing piece 38preferably extends outwardly so as to be flush with the I,outside of thewall 13 to provide a support along the greater portion of the bottomsurface of the arm 36. This arm has a transverse finger 39 which isjournaled in the connecting piece 40 as at 41, which connecting piece inits turn is hinged to a small bracket 42 on the inner side of the innershutter 19. With both shutters closed, the arm 36 is housed within thechamber 35, but when the inner shutter 19 is open as best sean in Figure3, the arm 36 swings outwardly through the opening 13 in the outer walland, upon contacting with the inner side of the shutter 17, it compelsthe latter to rise outwardly and uncover the opening 13.

To assure `that the shutters will tightly close the openings, I provideone or more tension springs 15 which have their endsattached to theshutters 17 and 19. In some cases it might be preferable to supplyindividual springs for each ot the shutters,which springs in that casewould have their inner ends secured to some suitable staple in thechamber 35. i

In Figures 1 and 2 is shown a screen D16 for keeping flies and otherinsects out of the room. This screen covers the entire opening inthe-inner wall 16 and may also be supplied for the opening in the outerwall thereof, not here shown in the drawings. Around the shank of theconnecting piece 40, a rubber packing L17 is provided in order to leaveno access for insects from the outside.

The operation of the device is as follows:

To open the shutters from the closed position illustrated in Figures 1and 2, it is only necessary to lift the handle 32 out of its engagementin the bracket 84 and pull thereon so that the guide rod 29, togetherwith the connecting link 27, is'drawn downward, thereby swinging theshutter 19, through the intermediary of the bell crank 22 and thetransverse arm 25, downwardly.

Simultaneously the connecting piece -10 actuates the swinging arm 36,which, through its engagement with the tace of the shutter 17, willswing the latter outward. rlhe advantage of having the shutter 17 hingedat its upper edge will now be understood, as snow or rain from theoutside will be prevented rom entering through the chamber 35 past theshutter 19 into the room. It will also be readily understood that, itthe tem' perature in the room is greater than on the outside, an aircurrent, carrying with it all the moisture, will pass through the inneropening 14 to chamber 35 and outer opening 13 into the outer atmosphere,thereby removing all steam or moisture in the room and preventing itscondensation.

Having thus described the invention what is claimed as new is:

1. A ventilator comprising a box-shaped frame having a transversepassage opening at opposite sides of the frame, a shutter on each sideof the frame covering said openings, said shutters each having hingedconnection with said frame along diagonali;v opposite edges of saidopenings respectively, means for swinging one ot said shutters, and

va two-armed lever mounted in the trame to swing in a plane at rightangles to the plane in which said first shutter swings, said twoarmedlever having linked connection with the irst shutter and loose abutmentcorr nection with the other of said shutters.

2. A ventilator comprising a box-shaped frame having a transversepassage opening at opposite sides of the frame, a shutter on each sideot the frame covering said open ings, said shutters each having hingedconnection with said frame along diagonally opposite edges of saidopenings respectively, a two-armed lever fulcrumed Y in said frame withits axis at right angles to said opposite edges of the openings, one armot' said lever having hinged connection with said first shutter, theother arm of the lever abutting against the other of said shutters toswing the latter when actuated by said first shutter.

3. A ventilator comprising a box-shaped frame, the inner and outer wallsof said frame being each provided with a longitudinal opening, a shutterhinged along the lower edge of the opening in said inner wall, a secondshutter hinged along the upper edge of the opening in said other wall. atwo-armed lever fulcrumed in said frame around a vertical axis, one ofthe arms of said lever having hinged connection with said first shutterand the other arm o'fsaid two-a-rn'ied lever having substantiallyhorizontal abutting engagement with said other shutter, and means formanipulating one of said shutters to simultaneously operate the other ofthe shutters through the interme diary of said two-armed lever.

In testimony whereof I aiiix my signature.

GEORGE HENRY MILLER. [n s]

